热空气比冷空气密度小，因此热空气总在冷空气上方。
Warm air is less dense than cooler air so it ends up layered on top of the downward moving cooler air.
大型陨石的撞击则可能偶发的使大气密度及温度增加。
Large meteor impacts may have occasionally thickened and warmed the atmosphere.
引擎将高超音速飞机带向空气密度、阻力比较稀少的高度。
That engine would carry the hypersonic craft to an altitude where air density and resistance are less.
即使压力不变，气温的变化也能引起空气密度的巨大变化。
Even when the pressure stays the same, great changes in air density are caused by changes in temperature.
详细介绍过热蒸气密度补偿方案及新的过热蒸气密度补偿式。
The compensation scheme for the density of superheat steam and the new density compensation formula are introduced in detail.
大气压力随高度增加而降低，大气密度也随着高度增加而降低。
Atmospheric pressure decreases with increase in altitude and so does the density of the atmosphere.
不像水或者空气密度的，周期变化，我们这里，讨论的是电场。
So, instead of having the periodic variation of water, or the periodic variation of air density here we're talking about an electric field.
其特点是不需要测量天然气中组分含量，天然气密度可溯源到频率。
The characteristic is not to analyze the components of natural gas, the density of natural gas can be traced to the frequency.
这种蜃像效应，在大气分层的温度造成大气密度剧烈变化时最为显著。
The effects are most pronounced when temperature layers in the atmosphere produce sharp changes in air density and refractive index.
大气阻力是低轨卫星主要的摄动力，与高层大气密度的变化密切相关。
Atmospheric drag is the main perturbation force on a low earth orbit satellite and is closely related to the variation of high atmospheric density.
动态压力是一个功能的速度和空气密度，而这又是取决于海拔高度和温度。
Dynamic pressure is a function of velocity and air density, which in turn is dependant upon altitude and temperature.
两座建筑的氧气密度都在大约21%，足够让工人进入建筑，这家公司如是说。
Oxygen densities in both buildings were about 21%, high enough for workers to enter the buildings, the firm said.
最后指出剪裁沟道右势垒可以弱化高、低电子气密度下输运和噪声性能的衰退。
At last it is shown that the declining of transport and noise performance under high and low electron concentration may be weakened through the right barrier tailoring.
风资源的评价不应当只有风速、风向、空气密度等常规指标，还应评估风的质量。
The appraisal of the wind resources cant be given only by the speed, direction, air density, etc.
通过数据拟合得到了流注稳态传播电场和相对空气密度以及湿度之间的经验公式。
An empirical equation was obtained for explaining the relationship between streamer stability propagation field and relative air density, humidity.
通过应用振动式密度计试验研究，在国内建立起一种天然气密度在线测量的新方法。
A new method, on-line measurement of the density of natural gas, has been established by researching on vibrating element density transducer tests.
指出对质量流量影响最大因素依次为蒸气密度、可膨胀系数、节流件内径及流量系数。
Also the paper lists the factors mostly affecting the mass flow measurement consecutively as steam density, expandable coefficient, inner diameter and flow coefficient of the throttle element.
同一时期，海洋散热较慢，温度相对地较高，空气密度变化较小，遂形成相对的低压区。
The same period, the ocean thermal slow, relatively high temperature, air density changes smaller solipsism relative area of low pressure.
二位置通常使用确定空气密度根据在大量上的被测量的区别在二空气浮力人工制品之间。
Two of the positions are normally used to determine air density based on the measured difference in mass between two air buoyancy artefacts.
大气密度和温度的变化加上尘埃负荷。但是要意识到地球的自转和轨道处于不断的修正中。
Change in atmospheric density and temperature plus dust loading. But be aware that the planet's spin and orbit are being modified.
具有良好的重复性和准确度，可作为天然气密度的一种测量方法使用，能满足计量的要求。
The method has favorable repeatability and accuracy, can be used to measure the density o...
前言：通过应用振动式密度计试验研究，在国内建立起一种天然气密度在线测量的新方法。
A new method, on-line measurement of the density of natural gas, has been established by researching on vibrating element density transducer tests.
大气层是包围着地球的空气，根据空气密度的不同分为5层，总共有2000- 3000公里厚。
Earth's atmosphere is surrounded by air, the air density, divided into 5 layers, total of 2000-3000 km thick.
日冕的电离气体（又叫等离子体）不仅非常炙热，而且异常稀薄，其密度还不到组成太阳主体的氢气密度的十亿分之一。
As well as being very hot, the ionised gas of the corona (called plasma) has a superthin consistency. It is less than a billionth of the density of the hydrogen that makes up the main ball of the Sun.
海拔每上升1000米大气压力- - -也就是空气密度- - -会降低大概11%(虽然精确的公式比这要更复杂。)
Every 1000 metres increase in altitude reduces atmospheric pressure - and hence the density of the air - by about 11 per cent (though the precise formula is more complicated than this).
结合相关公式分析了在一定条件下空气密度对空调性能产生重要影响，而湿球温度和海拔高度是影响空气密度的主要原因。
It was shown that wet bulb temperature and altitude could do effect on the air density which influence the performance of room air conditioner according with the other equation.
研究较全面分析了气体压缩性、液体粘性、表面张力效应、液气密度比以及滑移速度等重要因素对气体剪切流稳定性的影响。
The effects of parameters such as the gas compressibility, the liquid viscosity, surface tension, density ratio , and velocity ratio, have been considered.
研究较全面分析了气体压缩性、液体粘性、表面张力效应、液气密度比以及滑移速度等重要因素对气体剪切流稳定性的影响。
The effects of parameters such as the gas compressibility, the liquid viscosity, surface tension, density ratio , and velocity ratio, have been considered.
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